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-rw-r--r--groovy.html.markdown42
1 files changed, 35 insertions, 7 deletions
diff --git a/groovy.html.markdown b/groovy.html.markdown
index 1a635e59..8fb1b346 100644
--- a/groovy.html.markdown
+++ b/groovy.html.markdown
@@ -8,7 +8,7 @@ filename: learngroovy.groovy
Groovy - A dynamic language for the Java platform [Read more here.](http://groovy.codehaus.org)
-```cpp
+```groovy
/*
Set yourself up:
@@ -51,28 +51,56 @@ println x
/*
Collections and maps
*/
+
//Creating an empty list
def technologies = []
-//Add an element to the list
-technologies << "Groovy"
+/*** Adding a elements to the list ***/
+
+// As with Java
technologies.add("Grails")
+
+// Left shift adds, and returns the list
+technologies << "Groovy"
+
+// Add multiple elements
technologies.addAll(["Gradle","Griffon"])
-//Remove an element from the list
+/*** Removing elements from the list ***/
+
+// As with Java
technologies.remove("Griffon")
-//Iterate over elements of a list
+// Subtraction works also
+technologies = technologies - 'Grails'
+
+/*** Iterating Lists ***/
+
+// Iterate over elements of a list
technologies.each { println "Technology: $it"}
technologies.eachWithIndex { it, i -> println "$i: $it"}
+/*** Checking List contents ***/
+
//Evaluate if a list contains element(s) (boolean)
-technologies.contains('Groovy')
+contained = technologies.contains( 'Groovy' )
+
+// Or
+contained = 'Groovy' in technologies
+
+// Check for multiple contents
technologies.containsAll(['Groovy','Grails'])
-//Sort a list
+/*** Sorting Lists ***/
+
+// Sort a list (mutates original list)
technologies.sort()
+// To sort without mutating original, you can do:
+sortedTechnologies = technologies.sort( false )
+
+/*** Manipulating Lists ***/
+
//Replace all elements in the list
Collections.replaceAll(technologies, 'Gradle', 'gradle')